Dose detection system module for a medication delivery device

Abstract

Dose detection systems for medication delivery devices are described. One is a module for removable attachment to a dose button of a medication delivery device. A device with a dose detection system is also disclosed. The module includes a processor and at least one measurement sensor operably coupled to the processor and configured to detect the position of a sensed component within the delivery device. Medication identification system may also be provided with an identification sensor and a light guide member.

1 - 26 . (canceled) 
     
     
         27 . A dose detection module to attach to a dose actuator of a medication delivery device, the dose actuator having a cylindrical button sidewall, said module comprising:
 a housing;   a plurality of attachment arms configured for coupling to the dose actuator; and   an electronics assembly contained in the housing, comprising a processor and a presence switch system mounted to a distal wall of the housing,   the presence switch system comprising a switch operably coupled to the processor, a switch actuator movable within an opening of the distal wall between a biased distal position and a proximal position to move the switch, the switch actuator comprising an actuator spring and a skirt configured to provide a radial pressure along an interior surface of the distal wall that is around the opening, a portion of the switch actuator comprising a flexible material,   wherein when at the proximal position the processor is configured to recognize that the module is attached to the dose actuator, and wherein when at the biased distal position the processor is configured to recognize that the module is not attached to the dose actuator.   
     
     
         28 . The module of  claim 27 , where when recognition that the module is attached to the dose actuator is made by the processor, the processor is configured to allow the electronics assembly to wake up or be provided with power. 
     
     
         29 . The module of  claim 27 , where when recognition that the module is not attached to the dose actuator is made by the processor, the processor is configured to set the electronics assembly in a non-use state. 
     
     
         30 . The module of  claim 27 , wherein the switch actuator comprises a first member and a second member having a cup configuration configured to receive the first member, wherein the second member comprises the flexible material, the second member comprising a radial rim that is disposed between the skirt and the interior surface to inhibit particulate ingress when the switch actuator is at the biased distal position. 
     
     
         31 . The module of  claim 30 , wherein the switch comprises a switch arm, wherein the switch actuator is movable to contact the switch arm. 
     
     
         32 . The module of  claim 27 , wherein the electronics assembly further comprises at least one measurement sensor operably coupled to the processor, wherein the at least one measurement sensor is responsive to a sensed parameter of a rotatable sensed component of the medication delivery device from an angular position and/or a rotational movement of the rotatable sensed component. 
     
     
         33 . The module of  claim 32 , wherein the at least one measurement sensor is axially and rotatably locked with the sensed component during dose setting, and rotatably free relative to the sensed component during dose dispensing. 
     
     
         34 . The module of  claim 27 , wherein the electronics assembly further comprises an identification sensor operably coupled to the processor, wherein, when the dose detection module is attached to the dose actuator, a light guide member is disposed between the identification sensor and an axial surface of the dose actuator, the light guide member is configured to provide an optical path for the identification sensor, wherein the light guide member is attached to a housing wall of the housing. 
     
     
         35 . The module of  claim 34 , wherein the identification sensor is configured to emit light and/or detect color of said dose actuator after reflection of light from the dose actuator. 
     
     
         36 . The module of  claim 34 , wherein the light guide member includes a light guide post proximally extending through an opening of a housing wall of the housing. 
     
     
         37 . The module of  claim 27 , wherein the attachment arms extend beyond a distal wall of the housing, the attachment arms being angularly spaced from one another, each of the arms having a bearing portion to be received into a corresponding recesses formed in the cylindrical button sidewall of the dose actuator. 
     
     
         38 . The module of  claim 27 , wherein the electronics assembly further comprises a plurality of magnetic sensors operably coupled to the processor, wherein magnetic sensors are responsive to a magnetic field of a rotatable magnetic component of the medication delivery device from an angular position and/or a rotational movement of the rotatable magnetic component. 
     
     
         39 . The module of  claim 27 , wherein the magnetic component comprises a bipolar magnetic ring, and the magnetic sensors are disposed at an arrangement to overlap an outer circumference of said bipolar magnetic ring. 
     
     
         40 . A dose delivery system, comprising:
 a medication delivery device having a dose actuator coupled to a device body, a reservoir containing a medication, an end of the body configured to receive a needle, wherein the dose actuator has a cylindrical button sidewall; and   a dose detection module removably attached to said dose actuator, said module comprising a housing, a plurality of attachment arms configured for coupling to the dose actuator, and an electronics assembly contained in the housing, comprising a processor and a presence switch system mounted to a distal wall of the housing, the presence switch system comprising a switch operably coupled to the processor, the switch comprising a switch arm extending laterally beyond an opening formed in the distal wall, a switch actuator movable within the opening between a biased distal position and a proximal position, the switch actuator comprising a first member and a second member configured to receive the first member, the second member comprising a flexible material, wherein the first member includes a skirt configured to provide radial pressure along a radial lip of the second member against an interior surface around the opening of the distal wall to inhibit particulate ingress,   wherein when the dose detection module is attached to said dose actuator the presence switch is at the proximal position and the processor is configured to recognize that the module is attached to the dose actuator, and   wherein when the dose detection module is removed from said dose actuator the presence switch is at the biased distal position and the processor is configured to recognize that the module is not attached to the dose actuator.   
     
     
         41 . The system of  claim 40 , where when recognition that the module is attached to the dose actuator is made by the processor, the processor is configured to allow the electronics assembly to wake up or be provided with power. 
     
     
         42 . The system of  claim 40 , where when recognition that the module is not attached to the dose actuator is made by the processor, the processor is configured to set the electronics assembly in a non-use state. 
     
     
         43 . The system of  claim 40 , wherein the switch actuator comprises an actuator spring to bias the switch actuator at a distal position, wherein the switch actuator is movable to contact the switch. 
     
     
         44 . The system of  claim 43 , wherein the switch actuator is contactable with the switch arm when being moved away from the distal position.